There is a particular evening, somewhere in the last week of October, when the cold stops being a rumour and becomes a fact. The clocks have fallen back, the radiators are making their first tentative noises of the year, and somewhere around nine o'clock you notice a faint scratch at the back of the throat and a draught you cannot quite place. This is not an emergency. It is an invitation. Put the kettle on, reach past the gin, and make yourself a hot toddy.

The toddy is the most forgiving drink in the whole canon. It asks for whisky, honey, hot water and lemon, and it rewards almost any competent attempt with something greater than the sum of its parts. It is also, quietly, one of the easiest drinks to make badly: too sweet, too weak, scalding hot, or built on a bottle that has no business being anywhere near a kettle. Here is how to land on the right side of all of that.

A drink older than the central heating

Nobody can quite agree on where the word comes from, which, as with so many good drinks, is usually a sign that something has been loved for a very long time. One camp traces it to Tod's Well, the spring that once helped supply Edinburgh with its water, on the pleasing logic that a toddy is really just hot water with ambitions. Another points much further afield, to the Hindi taddy, a drink made from the fermented sap of palm trees and carried home by way of the British in India. Take your pick. Both stories end in the same place: a warm glass on a cold night.

What is not in dispute is that the toddy became a fixture of the Scottish winter, the standard answer to a long dark evening and a longer, darker cough. It turns up in the poetry of Burns's century and in the memoirs of every Victorian who ever claimed a chill. For most of its life it was less a cocktail than a household habit, the sort of thing a grandmother made without once reaching for a measure. That is precisely its charm, and precisely why it is worth making properly.

What actually goes in it

At its heart the toddy is four things: a measure of whisky, a spoon of honey, a good squeeze of lemon, and hot water to bring it together. Everything else is a flourish. The proportions that rarely fail are fifty millilitres of whisky, two teaspoons of honey, the juice of a quarter lemon, and roughly a hundred and twenty millilitres of hot water. Stir until the honey surrenders, taste, and adjust from there: more honey if the night calls for comfort, more lemon if it calls for a lift.

The single most common mistake is heat. Boiling water bullies the whisky, scorches the lemon and flattens the aromatics into something medicinal in the worst sense. Let the kettle settle for a minute off the boil, somewhere around eighty degrees, and the drink keeps its perfume and its point.

The whisky question

This is where a toddy is quietly won or lost. The instinct to reach for your very best bottle is a noble one, and entirely wrong. Heat and honey will flatten the fine detail of a great malt, so pouring a venerable dram into a mug of hot water is a little like using vintage Champagne to deglaze a pan. Save the good stuff for the glass it deserves.

What you want instead is a whisky with warmth and a honeyed streak, the sort of thing that meets the sugar and lemon halfway. A gentle Speyside is the textbook choice. The Singleton of Glendullan 12 is almost suspiciously well suited to the job, all orchard fruit, barley sweetness and a soft, nutty roundness that only improves once the honey arrives. If you want a toddy with more shadow and spice, a sherried malt earns its place: Bonnington Sherry Cask brings dried fruit, a little Christmas-cake richness and enough backbone to stand up to a heavy hand with the cloves. Traditionalists will tell you a good blended Scotch is the honest, historically correct choice, and they are not wrong, but a characterful single malt turns a folk remedy into something you would actually choose to drink. A smooth Irish whiskey works a treat too, if a softer, rounder toddy is what the evening wants.

How to make it

The method is as short as the ingredient list. Warm the glass or mug first, with a splash of hot water you then tip away, so the finished drink does not lose its heat to cold glass. Add two teaspoons of honey and a measure of whisky, and stir until the honey has dissolved into the spirit. Squeeze in the lemon, drop the spent quarter into the glass if you like, then top with hot water from a kettle that has been allowed to calm down. Stir once more, and give it a minute to come together before the first sip.

A heatproof glass with a handle is the civilised choice, but a favourite mug is entirely in keeping with the spirit of the thing. This was never a drink that cared about stemware.

The honey, the lemon and the spice

With so few ingredients, the supporting cast matters more than it should. Use a honey with some character, a runny blossom or heather honey rather than the set, anonymous sort, and it will dissolve more kindly too. Squeeze the lemon fresh, always: the bottled stuff tastes of the cupboard it came from. And if you want to dress the drink up for the season, this is the moment. A clove-studded lemon wheel, a short stick of cinnamon, a single star anise, a curl of orange peel: any one of them turns a toddy into something that smells like December. Add them to the glass before the water, and go gently. One clove too many and the whole thing tastes like a pomander.

Cure, or comfort?

We should be honest about the toddy's great reputation. It will not cure a cold. No warm drink will, and the whisky least of all. What it will do is genuinely soothe: the steam loosens a blocked nose for a while, the honey coats a raw throat, the lemon is a small bright hit of something that at least feels virtuous, and the warmth is a comfort all its own. Think of it less as medicine and more as the civilised way to feel sorry for yourself, one measured glass at a time and no more. On a well night it is simply a lovely thing to drink by the fire. On a rough one it is the next best thing to being looked after.

Last pour

The toddy is the drink of the dark half of the year, the one that arrives with the first real cold and quietly stays until the clocks spring forward again. It asks for four things, two minutes and a kettle that knows when to stop, and it gives back a small warm ritual for exactly the kind of evening that needs one. If it leaves you curious about the whisky underneath it, there is more on sherried whisky, the dram that tastes of autumn, and on how to get into whisky without the ceremony. But start tonight, with the first proper chill of the season at your back, and you will understand why this one has never once gone out of fashion.